L.A.’s Department of Transportation ordered the ride-sharing companies to shut down in June. But that order was ignored, both by the ride-sharing companies and by the city. L.A. Mayor Eric Garcetti has expressed support for ride-sharing, and argued that taxi companies should keep up with innovation.

Sensor Platforms in San Jose, has added Pedestrian Dead Reckoning to its FreeMotion Library of algorithms. Their system uses 10-axis sensor fusion on the data from micro-electro-mechanical system (MEMS) sensors — accelerometers, gyroscopes, magnetometers and barometric pressure sensors (for altitude) — to calculate the distance traveled by a user as well as bearing, working from the last known GPS waypoint.

Other indoor navigation systems require RF receivers that triangulate their location from WiFi router signals or RF beacons, but dead-reckoning systems calculate location by keeping track of the distance and direction they have traveled since the last known waypoint. Sensor Platforms claims its solution provides accuracy within a few percent of the distance traveled from the last known waypoint.